atest/genrunner.py: enforce using .robot extension (#1766)
atest/genrunner.py: enforce using .robot extension (#1766)

stasiek/robotframework,fingeronthebutton/robotframework,Colorfulstan/robotframework,HelioGuilherme66/robotframework,ChrisHirsch/robotframework,ChrisHirsch/robotframework,joongh/robotframework,userzimmermann/robotframework,edbrannin/robotframework,jorik041/robotframework,eric-stanley/robotframework,yahman72/robotframework,moto-timo/robotframework,eric-stanley/robotframework,rwarren14/robotframework,robotframework/robotframework,robotframework/robotframework,JackNokia/robotframework,robotframework/robotframework,snyderr/robotframework,snyderr/robotframework,kyle1986/robortframe,edbrannin/robotframework,kurtdawg24/robotframework,yahman72/robotframework,HelioGuilherme66/robotframework,alexandrul-ci/robotframework,suvarnaraju/robotframework,kyle1986/robortframe,fingeronthebutton/robotframework,suvarnaraju/robotframework,rwarren14/robotframework,nmrao/robotframework,un33k/robotframework,nmrao/robotframework,wojciechtanski/robotframework,joongh/robotframework,userzimmermann/robotframework,joongh/robotframework,Colorfulstan/robotframework,xiaokeng/robotframework,jaloren/robotframework,suvarnaraju/robotframework,snyderr/robotframework,yonglehou/robotframework,SivagnanamCiena/robotframework,kyle1986/robortframe,ashishdeshpande/robotframework,synsun/robotframework,ashishdeshpande/robotframework,jaloren/robotframework,SivagnanamCiena/robotframework,ashishdeshpande/robotframework,nmrao/robotframework,kurtdawg24/robotframework,ashishdeshpande/robotframework,ChrisHirsch/robotframework,fingeronthebutton/robotframework,moto-timo/robotframework,xiaokeng/robotframework,yahman72/robotframework,JackNokia/robotframework,alexandrul-ci/robotframework,SivagnanamCiena/robotframework,ashishdeshpande/robotframework,joongh/robotframework,fingeronthebutton/robotframework,jorik041/robotframework,moto-timo/robotframework,nmrao/robotframework,dkentw/robotframework,kurtdawg24/robotframework,un33k/robotframework,JackNokia/robotframework,stasiek/robotframework,HelioGuilherme66/robotframework,yonglehou/robotframework,wojciechtanski/robotframework,ChrisHirsch/robotframework,stasiek/robotframework,xiaokeng/robotframework,rwarren14/robotframework,synsun/robotframework,xiaokeng/robotframework,SivagnanamCiena/robotframework,suvarnaraju/robotframework,snyderr/robotframework,moto-timo/robotframework,nmrao/robotframework,jorik041/robotframework,un33k/robotframework,kurtdawg24/robotframework,edbrannin/robotframework,wojciechtanski/robotframework,jorik041/robotframework,ChrisHirsch/robotframework,xiaokeng/robotframework,jaloren/robotframework,eric-stanley/robotframework,wojciechtanski/robotframework,jorik041/robotframework,yonglehou/robotframework,Colorfulstan/robotframework,alexandrul-ci/robotframework,JackNokia/robotframework,userzimmermann/robotframework,stasiek/robotframework,rwarren14/robotframework,Colorfulstan/robotframework,joongh/robotframework,rwarren14/robotframework,stasiek/robotframework,un33k/robotframework,yonglehou/robotframework,synsun/robotframework,SivagnanamCiena/robotframework,alexandrul-ci/robotframework,synsun/robotframework,edbrannin/robotframework,dkentw/robotframework,snyderr/robotframework,wojciechtanski/robotframework,kyle1986/robortframe,yonglehou/robotframework,fingeronthebutton/robotframework,userzimmermann/robotframework,yahman72/robotframework,jaloren/robotframework,jaloren/robotframework,eric-stanley/robotframework,kurtdawg24/robotframework,edbrannin/robotframework,JackNokia/robotframework,dkentw/robotframework,un33k/robotframework,synsun/robotframework,Colorfulstan/robotframework,kyle1986/robortframe,moto-timo/robotframework,alexandrul-ci/robotframework,dkentw/robotframework,dkentw/robotframework,yahman72/robotframework,userzimmermann/robotframework,suvarnaraju/robotframework